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Acta Armamentarii ›› 2017, Vol. 38 ›› Issue (11): 2240-2250.doi: 10.3969/j.issn.1000-1093.2017.11.022

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Availability Modeling and Analyzing of Multi-state Control Unit under Condition-based Maintenance

LI Zhi-qiang, XU Ting-xue, GU Jun-yuan, AN Jin, DONG Qi   

  1. (Department of Ordnance Science and Technology, Naval Aeronautical University, Yantai 264001, Shandong, China)
  • Received:2017-04-17 Revised:2017-04-17 Online:2018-01-03

Abstract: A modeling method of control units under condition-based maintenance (CBM) based on multi-state dynamic Bayesian network (DBN)is proposed for describing the dynamic characteristics of system. After defining multi-state components, a state-transition model based on Markov model is established in considering CBM, and absorbing state is introduced. A multi-state DBN model is established to determine the state-transition relationships with non-repair, perfect repair, imperfect repair, CBM and absorbing state. And the conditional probability value is obtained according to the logic relationship of series system and parallel system. A control unit is taken for example. The dynamic fault tree (DFT) and DBN model are established to determine the reliability curves of control unit and its components under different repair modes. And the weak links of reliability design are found through importance analysis. The simulated results show that the control unit under CBM has higher availability than the perfectly and imperfectly repaired control units. The availability of repairable components with degradation states can be predicted, and a maintenance policy can be made accordingly. Key

Key words: ordnancescienceandtechnology, dynamicBayesiannetwork, conditional-basedmaintenance, perfectrepair, imperfectrepair, dynamicfaulttree, importanceanalysis

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